Cargando…
Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir,...
Autor principal: | |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2012
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449042/ http://dx.doi.org/10.3390/ma5101826 |
_version_ | 1783239688570535936 |
---|---|
author | Kyzas, George Z. |
author_facet | Kyzas, George Z. |
author_sort | Kyzas, George Z. |
collection | PubMed |
description | This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir, Freundlich and Langmuir-Freundlich model (L-F). The maximum adsorption capacity of the coffee residues can reach 70 mg/g for the removal of Cu(II) and 45 mg/g for Cr(VI). The kinetic data were fitted to pseudo-first, -second and -third order equations. The equilibrium was achieved in 120 min. Also, the effect of pH on adsorption and desorption was studied, as well as the influence of agitation rate. Ten cycles of adsorption-desorption were carried out revealing the strong reuse potential of these low-cost adsorbents; the latter was confirmed from a brief economic approach. |
format | Online Article Text |
id | pubmed-5449042 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54490422017-07-28 Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions Kyzas, George Z. Materials (Basel) Article This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir, Freundlich and Langmuir-Freundlich model (L-F). The maximum adsorption capacity of the coffee residues can reach 70 mg/g for the removal of Cu(II) and 45 mg/g for Cr(VI). The kinetic data were fitted to pseudo-first, -second and -third order equations. The equilibrium was achieved in 120 min. Also, the effect of pH on adsorption and desorption was studied, as well as the influence of agitation rate. Ten cycles of adsorption-desorption were carried out revealing the strong reuse potential of these low-cost adsorbents; the latter was confirmed from a brief economic approach. MDPI 2012-10-10 /pmc/articles/PMC5449042/ http://dx.doi.org/10.3390/ma5101826 Text en © 2012 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Kyzas, George Z. Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title | Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title_full | Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title_fullStr | Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title_full_unstemmed | Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title_short | Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions |
title_sort | commercial coffee wastes as materials for adsorption of heavy metals from aqueous solutions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449042/ http://dx.doi.org/10.3390/ma5101826 |
work_keys_str_mv | AT kyzasgeorgez commercialcoffeewastesasmaterialsforadsorptionofheavymetalsfromaqueoussolutions |